ampeg 4 input tube head.

jumbodbassman · July 05, 2011, 01:16:58 PM

i have never done this but seems that some people do. What does using more than one input into a tube head do. Increase power?, blend tones,

and what is the way to do it - AB or y, plug one into another.

also best way to hook up 2 tube heads together??

Lots of amp knowledge out there so

The amps in play are the 2 B15S's in my avatar. "only" 60 watts/138 each

lowend1 · July 05, 2011, 02:58:25 PM

Depends on the amp. Many 4-input amps give you the opportunity to "jump" the inputs. By that, we typically mean plugging an instrument into one input from Channel A and then running a short cord from the second "A" input to an input on Channel B. You can mix and match as to which path you actually use. The end result is usually a nominal increase in the punch and volume, as both volume controls are now interacting. Again depending on the amp (two sets of tone conrols), the tone controls may interact as well. I do this with my SVT, and the trick is also common on four-input Marshalls. I've tried it with a Fender Super Reverb, and it didn't work.

patman · July 05, 2011, 03:05:16 PM

Seems like I remember people doing this with Fender Twins a lot back in the 70's?

jumbodbassman · July 05, 2011, 03:06:39 PM

does it matter that the second "a" input is a bright input?? will that make the "b" channel bright even if putting into the normal input

lowend1 · July 05, 2011, 06:04:14 PM

You will get slight variations in tone and volume depending on how you do the jump, and the bass you are playing. Season to taste...

jumbodbassman · July 06, 2011, 08:46:30 AM

thanks. will give it a try....

where in NJ are you? Used to live in the Princeton area.

lowend1 · July 06, 2011, 08:57:31 AM

I'm up in Bergen County - home of shopping malls and high property taxes.

lowend1 · July 06, 2011, 09:01:05 AM

Actually, you might even be able to gang the amps together by either using the inputs or (if it has one) the external amp jack(s) out back...

ramone57 · July 07, 2011, 11:11:54 AM

Quote from: lowend1 on July 06, 2011, 08:57:31 AM
I'm up in Bergen County - home of shopping malls and high property taxes.

ah, the ancestral home!

FrankieTbird · July 07, 2011, 06:02:38 PM

Quote from: ramone57 on July 07, 2011, 11:11:54 AM
ah, the ancestral home!

Me too - lived in Lodi before I moved to TX.

lowend1 · July 07, 2011, 09:24:47 PM

I grew up in Lodi...

nofi · July 08, 2011, 07:17:22 AM

so did glenn danzig.

jumbodbassman · July 08, 2011, 08:03:13 AM

my dad's family had a bakery in Rutherford back in the 50/60's.

lowend1 · July 08, 2011, 12:42:14 PM

Quote from: nofi on July 08, 2011, 07:17:22 AM
so did glenn danzig.

You mean Glenn Anzalone?
I graduated HS with Jerry.

clankenstein · July 08, 2011, 04:58:05 PM

something to watch out for- on a 7os type svt the preamps are out of phase so jumpering the inputs makes the sound thinner not fatter.